Mill.



Pitented Dec. 29, I899. J. DAIN, 1n. 9

MILL.

(Application filed Apr. 22, 1898.)

No. 639,7I7.

2 Sheets-$haet 1.

(In Nodal.)

Patented Dec. 26, I899. a J. DAIN,1R.

MILL

(A lication-1116a Apr. 22, 1898.)

2 Sheets-$heet 2,

(No Model.)

"m: NORRIS PETERS ca, Pnoruumo wuuluomn. n, c.

PATEN JOSEPH DAIN, JR., OF CARROLLTON, MISSOURI.

MILL.

$PECIFIOATION formingpart of Letters Patent No. 639,717, dated December26, 1899.

Application filed April 22, 1898.

To all whom it may concern.-

Be it known that I, JOSEPH DAIN, Jr. a citizen of the United States,residing at Carrollton, in the county of Carroll and State of Missouri,have invented certain new and useful Improvements in Mills, of which thefollowing is a specification, reference being had to the accompanyingdrawings.

My invention relates to mills, particularly of the type used by stockmento grind feed from corn, corn and cob, corn and oats, or any feedinggrain, although the improvements herein described and claimed areapplicable to mills used for various other purposes.

My improvements consist in mechanism by which one of the members of thegrinding devices is caused to rotate at a greater speed than that of theteam or equivalent operating power, thereby greatly increasing thegrinding effect, and also in providing means whereby the hopper rotatesat a slower rate than the moving member of the grinding devices,therebypreventing the hanging up or clogging of the ears of corn in the hopper,as frequently happens in mills at present in use.

My invention also consists in certain other features which will behereinafter fully pointe'd out.

In the drawings, Figure 1 is a plan View, some parts being broken away.Fig. 2 is a Vertical section on line 2 2 of Fig. 1. Fig. 3 is a sideelevation, some parts being in section and Fig. 4 is a horizontalsection on line 4 1 of Fig. 2.

Referring to the drawings, wherein my improvements are illustrated asapplied to a horse-power grinding-mill for grinding feed, 5 indicates areceiver adapted to receive the ground material and of suitable shape tosupport the parts of the mill.

6 indicates the base of the mill, which is mounted upon the edges of thereceiver 5, as illustrated in Figs. 2 and 3, and is suitably securedthereupon. As shown in Fig. 2, the base 6 is somewhat conical in shapeand is provided with an upwardly-extending annular flange 7, which isroughened and forms the upper part of the outemnember or bur 7 of thegrinding devices. As shown in Fig. 2, the upper edge of the flange 7 isbeveled, forming a tongue 8 for a purpose which will be hereinafterexplained. 9 indicates an an- Serial Nb. 678,467. (No model.)

nular rack carried by the base 6 outside of the annular flange 7,asshown in Figs. 2 and 3.

. 10 indicates an annular track between the rack 9 and the flange 7.

11 indicates a ring which is provided with a suitable grooved recess 12in its lower edge, which groove is adapted to receive the tongue 8 ofthe flange 7, as shown in Fig. 2. By this construction the material fedinto the mill is prevented from working in between the ring 11 and theflange 7, thereby preventing clogging of the machine. As shown in Figs.1 and 2, the ring 11 carries a series of pintles 13, spaced an equaldistance apart and preferably three in number, although a greater orless number may be used.

14 indicates traveling pinions which are mounted upon the pintles 13 andare adapted to meshwith the teeth of the rack 9, as shown in Figs. 2 and3.

indicates rollers which are mounted upon the pintles 13, between thepinions 14. and the ring 11, as shown in Fig. 2, and rest upon the track10. The rollers 15 serve to carry the weight of the superincumbent partsof the apparatus and prevent the pinions 14 from entering too farintomesh with the rack 9. By this means when the burs are tightened, as willbe hereinafter described, the pressure is received upon the rollers 15and not upon the pinions 14, as would otherwise bethe case.

16 indicates a rotary grinding-frame which is mounted over the ring 11and rests upon the upper surfaces of the rollers 15, as illustrated inFig. 2, it being provided with a suitable track 17 to receive therollers. The grinding-frame 16 is also provided with an annular rack 18,which meshes with the pinions 14, as illustrated in Figs. 2 and 3.

19 indicates an annular flange which projects downward from the body ofthe grind ing-frame 16 and somewhat beyond the up per inner edge of thering 11, thereby forming a close connection and preventing any materialunder treatment from working out of the mill. The grinding-frame 16isalso provided with a hub 20, centrally located and secured by arms 21,which are connected to the grinding-frame 16. The hub 20 is fitted upona stationary hub 22, secured to the main frame 6 by arms 23, as shown inFig.

.3. The rotary hub 20 is provided with a sleeve 24,- which extends downthrough the hub 22 and carries at its lower end a cap-plate 25, which issecured in place by bolts 26, thus binding the two hubs together andpreventing access of dust or small particles of the material undertreatment.

27 indicates the movable bur, which is conical in form and is adapted tocooperate with the stationary bur to effect the grinding of thematerial. The movable bur 27 is provided with an upwardly-extendingsleeve 28, which extends through the hub 20 and is vertically movabletherein. In order that the bur 27'may be keyed to and rotated with thehub 20, it is provided with grooves 29, adapted to receiveinternally-projecting ribs 30, carried by the hub 20, as shown in Fig.4. The bur 27 is adjusted vertically to regulate the grinding by anadjusting-rod 31, the lower end of which is screw-threaded and screwsinto a socket in the sleeve 28, its upper end being fitted in a cap 32,which rests upon the upper end of the hub 20, as shown in Fig. 2. Bythis construction the degree of fineness of the grinding maybe readilyadjusted by simply rotating the rod 31 in the proper direction.

I11 the apparatus illustrated the ring 11 is rotated to operate the millby a forked lever consisting of arms 3a, which are connected by pins 3536 to said ring, and by a pin 37, which projects into a cross-bar 38,connected at its ends to the rear ends of the arms 33 34, as illustratedin Fig. 1.

39 indicates the hopper, which is mounted above the grinding-frame 16and is adapted to discharge into the mill in the usual manner. Thehopper 39 is mounted upon standards 40, supported upon the pintles 13 ofthe ring 11, so that the hopper moves with said ring.

Theoperation of my improved apparatus is as follows: The team beinghitched to the arms 33 34, said arms are rotated, thereby rotating thering 11. The rotation of said ring causes the pinions 14: to rotate byreason of their engagement with the annular rack 9 on the stationaryframe 6, and the rotation of said pinions thereby effected imparts arotation to the grinding-frame 16 through the engagement of said pinionswith the annular rack 18, carried by said grinding-frame. The result isthat each complete rotation of the operating-lever carries the pinions14 once around with it and effects their rotation upon their axes tosuch an extent as to give an additional rotation to thegrindingframe 16.The grinding-frame therefore rotates twice for each rotation of the ring11 and the operatinglever, thereby greatly increasing the capacity ofthe machine. The hopper 39 being supported upon the pintles 13 of thering 11 rotates with said ring, and consequently moves only half as fastas the grinding-frame 16, and this difference in movement serves toprevent the hanging up of the cars of corn or other material. Themovable arms 21 and the stationary arms 23 together cooperate to breakup cobs and large pieces of material to be ground.

I have described my improvements in detail in order that theconstruction illustrated maybe fully understood; but, as hereinbeforesuggested, I do not restrict myself to the details of constructionillustrated and described,as my in vention includes such changes andadaptations of my improvements as would suggest themselves to a skilledmechanic.

That which I claim as my invention, and desire to secure by LettersPatent, is-

1. In a grinding-mill, the combination of coacting burs, a rotatableannular rack connected with one of said burs, a pinion meshing with saidrack, means for driving said pinion, and a stationary annular rack withwhich said pinion meshes, substantially as described.

2. In a grinding-mill, the combination of a stationary frame having anannular rack, a stationary bur, a driving-ring mounted on said frame, arotary grindingframe, an annular rack carried thereby, a rotatable burconnected with the latter rack and arranged to cooperate with saidstationary bur, and one or more pinions carried by said ring and meshingwith said annular racks, substantially as described.

3. In a grinding-mill, the combination of coacting inner and outer burs,said inner bur being rotatable, an externally-arranged annular frameconnected with said inner bur, means for rotating said annular frame,traveling rollers supporting said annular frame, and a track for saidrollers, substantially as described.

4. In a grinding-mill, the combination of coaeting burs, one of saidburs being rotatable, an externally-arranged annular frame connectedwith said rotatable bur, traveling rollers supporting said annularframe, a track for said rollers, one or more pinions in juxtaposition toone or more of said rollers, an annular rack carried by said annularframe and meshing with said pinion, or pinions, means for driving saidpinions, and a stationary annular rack below and in mesh with saidpinion or pinions, substantially as described.

5. In a grinding-mill, the combination of coacting burs, an externalannular frame connected with one of said burs for rotating it, travelingpinions upon the peripheries of which said frame rotates, said pinionsbeing arranged to revolve about said burs, means for revolving saidpinions, and a hopper which travels with said pinions, substantially asdescribed.

6. In a grinding-mill, the combination of a stationary frame having anannular rack, and a track concentric with and adjacent to said rack, astationary bur, a driving-ring mounted on said frame, a rotary frame, abur connected with said rotary frame and arranged to coact with saidstationary bnr,an annu IIO lar rack and a track carried by said rotaryframe and arranged opposite, respectively, to the rack and track of saidstationary frame, and one or more pinions and a plurality of rollerscarried by said ring and running respectively upon said racks andtracks, substantially as described.

7. In a grinding-mill, the combination of lower and upper frames, upperand lower 00- acting burs connected with said frames the lower bur beingconnected with the upper frame, driving mechanism arranged between saidframes, and means for relieving said driving mechanism from grindingpressure, substantially as described.

8. In a grinding-mill, the combination of a stationary frame, having anannular rack, a bur, a driving-ring mounted on said frame, a rotarygrinding-frame above said ring, a rotary bur connected therewith, anannular rack carried by said rotary frame, one or more pinions carriedby said ring and meshing with said racks, and a hopper mounted on androtating with said ring, substantially as described.

9. In a grinding-mill, the combination of a stationary frame having ahub, a rotary frame having a hub adapted to rest above said stationaryhub, said rotary hub having a sleeve which fits into said stationaryhub, a bur carried by said rotary frame, and a cap fitted over the lowerend of said sleeve and the stationary hub, substantially as described.

10. In a grinding-mill, the combination of a stationary frame having ahub, a rotary frame having a hub adapted to rest above said stationaryhub, said rotary hub having a sleeve which fits into said stationaryhub, a bur carried by said rotary frame, and a cap fitted over the lowerend of said sleeve and the stationary hub and secured to said rotaryhub, substantially as described.

11. In a grinding-mill,the combination with a stationary frame, havingan annular rack, of'a driving-ring mounted upon said frame, said ringand frame having a tongue-andgrooved connection, one or more pinionscar'- ried by said ring, a rotary grinding-frame, an annular rackcarried thereby and meshing with said pinions, and a bur carried by saidrotary frame, substantially as described.

12. In a grinding-mill, the combination of grinding devices, two annularracks spaced apart, one of said racks being connected with a movablemember of the grinding devices, a pinion between and meshing with saidracks, and a rotatable ring supporting said pinion, substantially asdescribed.

' JOSEPH DAIN, J R.

Witnesses:

JOHN L. JACKSON, HOLMES A. TILDEN.

